Locking and tripping device for power lift implements



NOV. 22; 1932. VAUGHN 1,888,521

LOCKING AND TRIPFING DEVICES FOR POWER LIFT IMPLEMENTS Original Filed Oct. 12, 1931 2 Sheets-Shea 1 o s 2 f 2 Inventor Jesse A. Vaqg/m Allomey ,5

J. A. VAUGHN Nov. 22, 1932.

1,888,521 Loom-us 'AND TRIPPING DEVICES FOR POWER LIFT IMPLEMENTS 2 Sheets-Sheet 2 Original Filed Oct. 12, 1931 lm'cntor Jesse A. Vaqg/m Attorney .3

Patented Nov. 22, 1932 UNITED STAT s PATENT OFFICE Muflpmam JESSE VAUGHN, 0F LOS ANGELES, CALIFORNIA, ASSIGNOR IO KILLEFER MANUFAC TURING CORPORATION, LTD., OF LOS ANGELES, CALIFORNIA, A CORPORATION CALIFORNIA IZOCKING AND TRIPPING- DEVICE FOR POWER LIFT IMPLEMENTS Original application filed October 12, 1931, Serial No. 568,258. Divided and this application filed July 12,

1932. Serial No. 622,065.

My invention relates to improved locking and'tripping devices for a power lift agricultural implement, and has particular reference to a power lift earth working tool which will securely lock the implement in an elevated or carrying position.

An object of this invention is to provide an improved locking and tripping device for a power lift earth working tool which will securely lock the implement in an elevated carrying position, and which improved looking means may be easily released to permit the implement to drop, due to gravity, to its operative or cultivating position.

This invention is a division of thatdisclosed in my copending application Serial No. 568,258, filed October 12, 1931, for improved locking and tripping device for a power lift implement. V

In the ordinary heavy type of power lift implement the operator must exert considerable effort to release the locking means and as the locking means are released many times during the normal operation of the implement the efiect is very fatiguing. It is there? fore a further object of this invention to provide a release for the locking means of such an implement which may be easily aotuated by the operator.

A further object of this invention is to provide a locking means which is strong and yet simple in construction.

Other objects and advantages of this invention will be apparent as the nature of the same is more fully understood from the following description and accompanying drawings, wherein is set forth what is now considered to be a preferred embodiment of the invention. It should be understood, however, that this particular embodiment of the invention is chosen principally for the purpose of exemplification, and that variations therefrom in details-of construction or arrangement of the parts may accordingly be effected and yet remain within the spirit and scope of the invention as the same is set forth in the appended claims.

In the drawings;

Figure 1 illustrates a side elevation of an agricultural implement with the invention applied thereto, a portion of the ground wheel having been broken away to more clearly illustrate the tripping device.

Figure 2 is an enlarged 'fragmentalview, partly in section, of the upper portion of the implement, in which the parts are illustrated in the position they assume when the implement is locked in elevated position.

Figure 3 illustrates a view similar to Fig. 2, but illustrating the parts in the position they assume when the implement has dropped into operative position.

Figured is a fragmental cross sectional View, taken substantially in the plane indicated by the line ll of'Figure 2, and in the direction of the arrows.

My improved locking and tripping device may be applied with advantage to any form or type of earth working or carrying tool, such as a plow, cultivator, harrow, scraper, or the like. For the purpose of illustration,

I have shown my invention as applied to that form ofv agricultural implement illustrated and described in the patent to A. WV. Hudson,

No. 1,710,222, dated April 22, 1929, which form of implement is. commonly referred to as a subsoil plow.

In Figure 1 my invention is illustrated as applied to a subsoil plow which includes, briefly, a frame 1 having a crank axle 2 journaled transverse thereof. Journaled upon the opposite ends of the crank axle are road wheels 3 each carrying a trundle or ratchet wheel 1 which is adapted to be engaged by hooks or pawls 5. The pawls 5 are journaled upon the frame and are provided with an actuating lever 6 which may be provided with a rope 7 for ease of operation. A standard 8 is mounted upon the frame and braced thereto by means of the brace members 9.

Slidably mounted through the standard 8 is a sliding control. bar 10 which preferably includes twospaced parallel bars 11 (note Figure 4). Secured at each end thereof are bearing blocks 12 "through which are journaled the threaded adjusting rod 13. The crank axle 2 carries a crank arm 14: which at its upper end is pivotally mounted to the slidingcontrol bar 10, adjacent the rear end thereof by means of a bolt 15. By this arrangement of parts, as the crank axle rotates the control bar is caused to slide through the standard 8. By placing appropriate stops are lowered into the soil, it is preferred to make one of the stops ad ustable. "Forth s purpose the threaded adjusting rod 13 is provided with an elongated stop nut 16 adapted to engage the standard. Whenthe implement has dropped to the desired position.

'I-he location of stop nut 16 is adjusted by rotating the adjusting rod by means of crank v handle 17.

' Suitably located upon the'frame is an appropriate earth working tool 18. It is sometimes desirable to elevate and maintain. the tool 18in elevated position, and for this purpose a lockingineans is provided which engages and holdsthe control bar from sliding rearward'ly. .As will'be understood by those skilled in" the art,. a rearward movement of the-control bar will permit the crank axle to rotate'in a direction which will result in the lowering' of the framewith relation to the wheels so that the tool which is carried thereby willrreturn to working relation with the ground.

"The locking means for retaining the control bar in its forward position may include,

as mostjclearly illustrated in. Figures 2 and 3, a stop pin 20 carried by the bars 11. An antifriction roller 21 is ournaled -upon the stop *pin 20-between the bars 11 torender the releasing-of the-locking means easier and also toprevent excessive wear of the-stop; pin.

A latch 22 is 'pivotally mounted upon the standard 8 by means of a shaft 23;

"By refer-ring particularly to Figure 4:, it will be observed that the shaft 23'may. also be utilized for connecting the upper ends of the bracemembers 9 to the standard and. also byuneans of the antifriction rollers 24 toslidingly support the control bar 10. "The upper end-of. the latch 22 is positioned to engage and retain the roller 21and through stop pin 20 to-lock the control bar in the position as illustrated-in" Figures 1- and 2. The latch'22 is pivotally-mounte'd upon the standard and would swing to release, the control bar if not retained from doingso'bya suitable tripping 'or releasing means.

The latch-22' is provided. at. its lower end with a quadrant'25-whieh,adjacent it's forward end, is provided with-a lo'ckingnotch 26* having a-stop lug 27 adjacent thereto.

The'rearfend of the quadrant is provided,

with-a stop lug 28. y In Figure 2 I have illustratedfthe latch 22 as being retained in looking position by a sliding bolt '29, slidablymounted in theimplement frame as at 30. A trip releaselever 1 31-isrpivoted to the frame 1 by a pivot. pin32 and is provided with a forwardly extending portion 33 pivotally and slidably connected to the sliding bolt 29 as at 34. To yieldingly retain the sliding bolt in the notch 26 a springi35 yieldinglya'ctsbetween the trip lever31 and the frame 1.

To facilitate an easy release of sliding boltpered.

Referring particularly to' F-igure 2, it will be observed that the implement is shown there in lockedelevatedposition. When it' is -desired'to lower the implement into Working position, the trip rope 38is actuated to swing the lever 31. forwardlypthereby sliding the bolt" 29 out of. the/quadrant, .notehj26. .The weight of the implement will cause. the latch 22 to swingto Ithe po'sitionindicatediniEigure3, whereuponthe stoproller 2O will roll over the end ofithel'atch. Assoon as the stop roller:21 passes over the. end. of the .latch' the implement will drop until: the stop nut. 16 engages the front. face of the standard8.

The release lever maybe very easilyswung even thougha large, heavy implementis operated,.due to thegreat leverage of leverfil and to the inclined surfaces '36. and37 of the lockingnotch and bolt and becausetheweight ofthe implement is. utilized. to swing-latch 22 into the releasing" position. In "other words, the release of the lockingmeans is self-actingonce the bolt, 29 is-Inoved outiof the notch26.

The implement. may be elevated, as isfully described in thepreviouslymentioned .patent to. A. H. .Hudson by swinging the hooks 5 to engage the trundlewheels 4. WVhen theimplement is elevated to the predetermined height, .the. hooks are automatically disengaged. from the. trundle; Wheels tostopr further liftingv thereof. 7 Just before the release of the lifting means takes place it isidesirable :tolock the implement in its elevated-position, and this is. accomplished by returning the latch 22 to its initial positionpafter swinging ittowrelease the control bar ;by means of the spring39,-suitably connecting the frame; and the latchlever: 22 (note-Figures 2-and;3.). As'soon as *the-latch22 returns-to its initialposition, the slidingbolt again. turns .tOltSilDllTlal position, the sliding bolt again engages the notch 26' to retain the latch=22 in looking position.

Asw ill be observed from the drawings, the rear face-oflatclr 22, adjacent the upper-end thereof, is inc-lined as at 4:1 to enableroller 21 to ride thereon to lift the control bar-over this end of the latch. Shortly after the roller 21 passes over'the'upper end of the latch the lifting means are automatically .disconnected and if-it were notfor the stop roller 21 engaging the forwardlfacev ofthelatchthe implement would return to its operative position.

To aid the control bar in dropping into locking position, a spring 42 may be provided. It is also desirable to return the hooks 5 to their inactive position when automatically released from the trundle wheels, and, therefore, spring 42 may be connected at one end to a forwardly extending portion 43 of the elevating lever 6, while the opposite end thereof may be suitably connected to the control bar, thus utilizing spring 42 for a dual purpose.

While I have illustrated the preferred embodiment of my invention, it is to be understood that the foregoing description is for illustrative purposes only, and I do not desire to be limited by any of the details shown or described, except as defined in the appended claims. 7

I claim:

1. A look and release device for an earth working implement of the lift type including a sliding control bar, a stop means carried thereby, a pivoted latch having one end adapted to engage said stop means, a retaining means operatively engaging the other end of said latch for holding said latch means in locking position, and a release means operable for actuating said retaining means to release said latch for unlocking said control bar.

2. A lock and release device for an earth working implement of the lift type including a sliding control bar, a stop means carried thereby, a pivoted latch means having one end adapted to engage said stop means, a retaining means operatively engaging the other end of said latch for holding said latch means in locking position, a release means operable for actuating said retaining means to release said latch for unlocking said control bar, and a spring means for returning said latch to locking position.

3. In a power lift implement, the combination of a frame, an earth Working tool carried thereby, a crank axle journaled to said frame, wheels journaled upon said axle, means for elevating said frame, means for disconnecting said elevating means, and means for locking said frame in elevated position including, a sliding control bar operatively connected to said axle, a latch means for locking said bar, a retaining means for holding said latch in looking position, and a release means operable for actuating said re taining means to release said latch for unlocking said control bar so that the frame can drop back to its operative position.

4. In a power lift implement, the combination of a frame, an earth workingtool carried thereby, a crank axle journaled to said frame, wheels journaled upon said axle, means for elevating said frame, means for disconnecting said elevating means, means for locking said frame in elevated position including a sliding control bar, operatively connected to said axle, a latch means for locking said bar, a'retaining means for holding said latch in locking position, a release means operable for actuatmg said retaining means to release said latch for unlocking said conday of July, 1932. V

JESSE I A.. VAUGHN. 

